Add Database Functionality - Booking form & Payments

We have created a database schema and wish to have the forms created to Add & Edit Bookings. We are at somewhat of a loss on how to do this and need someone to do it for us. The bookings creation form would need to be based on a query, and I have attached a PDF of the database schema for more information. There is also a small piece of functionality that needs adding and that is the abiility to enter payments into the database. We do not require payment processing, simply a button that says "Add payment" or something like that where you enter the amount. We also want to be able to create customer invoices based on their bookings. Some basic database information: A customer can have many bookings A booking can have only 1 customer A booking may have many activities An activity may have many pieces of equipment. **NOTE: We need a quick turnaround time for this (~3 days if possible).**